Distance
137.5
km · 85.4 mi
Bearing
222.2°
true · rev 42.2°
Terrain
BLOCKED
104.4 dB diffraction
Propagation
79/100
GOOD
Margin
-42.5
dB over CW threshold
Terrain profile · SRTM 30 m + canopy + MS footprints
Line of sight
1st Fresnel
Duct layer
Horizon ray
Common volume
Over the horizon: the two horizon-skimming rays intersect at the common volume ≈ 185 m AGL at the midpoint (556 m above the chord, 278 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 32.1 m) clears with margin. The geometric line of sight is obstructed — buried 277 m below terrain at its worst point.
Great circle
34.041, -95.625 → 33.12, -96.615 · 222.2°
Loss budget · 10 GHz
FSPL (free-space)
155.2
dB
Gaseous (O₂ + H₂O)
1.0
dB
Diffraction
104.4
dB
Rain attenuation
0.0
dB
Total path loss
260.5
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 14.6 g/m³
Power budget
TX power
20.0
dBm
(100.0 mW)
TX antenna gain
30.0
dBi
Feed loss (×2)
-2.0
dB
EIRP
48.0
dBm
Path loss
-260.5
dB
RX antenna gain
30.0
dBi
RX power
-182.5
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-42.5
dB
Path weather · HRRR average of 9 samples
Temperature
71.5 °F
21.9 °C
Dewpoint
63.3 °F
17.4 °C
T/Td gap
8.1 °F
4.5 °C
Abs. humidity
14.6
g/m³
Pressure
986.2
mb
PWAT
23.5
mm
BL depth
253.2
m AGL
Refrac. gradient
-147.4
N/km · super-refractive
Propagation factors · 10 GHz
79/100
Rain
100
14%
Humidity
95
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
85
10%
Refractivity
82
10%
Pressure
82
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
55
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-15 08:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
34.0, -95.6
21.0 °C
17.8 °C
990.7 mb
-128.9
288.6
25.7 mm
—
13%
33.9, -95.7
20.5 °C
18.2 °C
994.5 mb
-147.4
227.5
26.9 mm
—
25%
33.8, -95.9
21.4 °C
17.3 °C
990.1 mb
-102.0
256.3
23.9 mm
—
38%
33.7, -96.0
21.4 °C
17.6 °C
990.7 mb
-86.4
253.3
23.5 mm
—
Midpoint
33.6, -96.1
21.4 °C
18.0 °C
990.2 mb
-100.8
244.3
22.9 mm
—
63%
33.5, -96.2
22.1 °C
17.6 °C
986.2 mb
-125.9
254.9
22.4 mm
—
75%
33.4, -96.4
22.6 °C
17.1 °C
986.2 mb
-122.6
250.2
22.0 mm
—
88%
33.2, -96.5
22.9 °C
17.0 °C
988.8 mb
-123.5
237.3
21.9 mm
—
Destination
33.1, -96.6
24.1 °C
16.0 °C
987.4 mb
-91.5
266.6
22.0 mm
—
Midpoint vertical profile
18-hour forecast · this path · 10 GHz
→ steady
Peak 84
at 08:00 UTC
· low 70
at 22:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 84 | EXCELLENT |
| 09:00 | 77 | GOOD |
| 10:00 | 78 | GOOD |
| 11:00 | 78 | GOOD |
| 12:00 | 78 | GOOD |
| 13:00 | 75 | GOOD |
| 14:00 | 78 | GOOD |
| 15:00 | 77 | GOOD |
| 16:00 | 76 | GOOD |
| 17:00 | 72 | GOOD |
| 18:00 | 74 | GOOD |
| 19:00 | 73 | GOOD |
| 20:00 | 77 | GOOD |
| 21:00 | 79 | GOOD |
| 22:00 | 70 | GOOD |
| 23:00 | 73 | GOOD |
| 00:00 | 75 | GOOD |
| 01:00 · now | 75 | GOOD |